<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title>后盾人</title>
  </head>
  <body></body>
  <script>
    // let hd = { name: "后盾人" };
    // cms = hd;
    // let map = new WeakMap();
    // map.set(hd, "houdunren.com");
    // hd = null;
    // cms = null;
    // console.log(map);
    // setTimeout(function() {
    //   console.log(map);
    // }, 1000);
  </script>
</html>
